Thanks @DawnC , I got it to work with your help.
I'm using the download version ... after pressing the button to check the return for errors it then put up the 1040 highlighting the $300 and said it should be blank. I changed it to 0, reran and it had the same complaint ... so I blanked it out and that worked.
I would still call this a bug since it is requiring me to delete something it put in there (!) but am relieved it got to the right place in the end.
